For 1978 GMC P35 Radiator Cap 23739KTXM Safety Lever -- Relief pressure 16 lb

For 1978 GMC P35 Radiator Cap 59423BTCD Standard -- Relief pressure 16 lb

For 1978 GMC P35 Radiator Cap 95872QQNT Safety Lever -- Relief pressure 16 lb

For 1978 GMC C15 Radiator Cap 57133CV Safety Lever -- Relief pressure 16 lb

For 1958 GMC PM151 Radiator Cap 34783XMRR Safety Lever -- Relief pressure 7 lb

For 1978 GMC P35 Radiator Cap 93139GHTS Standard -- Relief pressure 16 lb

For 1978 GMC G35 Radiator Cap 43322XVZR Safety Lever -- Relief pressure 16 lb

For 1955 GMC PM250 Radiator Cap 55621DNBJ Safety Lever -- Relief pressure 4 lb